What a nice production. And even though I am not such a big admirer of his vocal abilities, (i don't like his "s", "t" or "j" 's) his voice is not that bad.
He has a long history with music, even if the only glimpses we got were from a little Fry and Laurie episodes or fragments from House. Yes he is no Sinatra, but a lot of people get away with it, Dylan comes in mind. (And yes maybe the other qualities in Dylan's voice makes him the ideal singer for his songs, but you can't deny his voice is no canary)